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The Turbomeca Orédon was a small French turbo-shaft / Auxiliary Power Unit (APU) engine produced by Turbomeca in the late 1940s.

Developed as a turbo-shaft / APU derivative of the TR 011 turbojet, the Orédon drove an alternator and was used as an aircraft auxiliary power unit. “Orédon” was reused for a later helicopter turboshaft design.

The Turbomeca Piméné, a larger turbojet version of the TR 011 / TT 782 / Orédon, was developed with greater mass-flow and single-stage turbine.

Variants

Orédon TT 782

Auxiliary Power Unit similar to the Piméné, but smaller, with the gas generator driving an alternator through a gearbox.

Specifications

Data from Aircraft engines of the World 1953

General characteristics

• Type: turboshaft / APU
• Length: 870 mm (34 in) without alternator
• Diameter:
• Dry weight: 81 kg (179 lb) with gearbox, 106 kg (234 lb) with alternator

Components

• Compressor: 1-stage centrifugal
• Combustors: single annular combustion chamber with rotary disc fuel injector
• Turbine: 2-stage axial
• Fuel type: kerosene
• Oil system: dry sump with Turbomeca gear pump at 1.4 bar (21 psi)

Performance

• Maximum thrust: ::Max continuous: 0.89 kN (200 lbf) at 34,000 rpm / sea level

Cruising: 0.78 kN (175 lbf) at 33,000 rpm / sea level

• Overall pressure ratio: 3.44:1
• Air mass flow: 1.25 kg/s (2.8 lb/s) at 35,000 rpm at sea level
• Turbine inlet temperature:
  

Before turbine: 850 °C (1,560 °F; 1,120 K)

After turbine: 700 °C (1,292 °F; 973 K)

• Specific fuel consumption: 0.59 kg/kWh (0.97 lb/(hp⋅h))
• Thrust-to-weight ratio: 2

References

1. ^ Kay, Anthony L. (2007). Turbojet History and Development 1930-1960 Volume 2:USSR, USA, Japan, France, Canada, Sweden, Switzerland, Italy and Hungary (1st ed.). Ramsbury: The Crowood Press. pp. 209–210. ISBN 978-1861269393.
2. ^ Wilkinson, Paul H. (1950). Aircraft engines of the World 1950 (8th ed.). London: Sir Isaac Pitman & Sons Ltd. p. 37.
3. ^ "AAPHT - La naissance de Turbomeca". www.amis-turbomeca.com (in French). Retrieved 16 January 2020.
4. Wilkinson, Paul H. (1953). Aircraft engines of the World 1953 (11th ed.). London: Sir Isaac Pitman & Sons Ltd. p. 48.

External links

• Minijets website : Piméné

• Turbomeca aircraft engines
• 1940s turbojet engines
• Mixed-compressor gas turbines